/*
 *  Copyright 2008 The Apache Software Foundation
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package org.apache.ibatis.ibator.generator.ibatis2.sqlmap.elements;

import org.apache.ibatis.ibator.api.dom.xml.Attribute;
import org.apache.ibatis.ibator.api.dom.xml.TextElement;
import org.apache.ibatis.ibator.api.dom.xml.XmlElement;
import org.apache.ibatis.ibator.generator.XmlConstants;


/**
 * @author matychen
 *
 */
public class OraclePaginationHeadGenerator extends AbstractXmlElementGenerator {
	public static final String ORACLE_PAGINATION_HEAD="Oracle_Pagination_Head";
    public OraclePaginationHeadGenerator() {
        super();
    }

    @Override
    public void addElements(XmlElement parentElement) {
        XmlElement answer = new XmlElement("sql"); //$NON-NLS-1$

        answer.addAttribute(new Attribute("id",  XmlConstants.COMMON + "."+ORACLE_PAGINATION_HEAD)); //$NON-NLS-1$

        ibatorContext.getCommentGenerator().addComment(answer);

        XmlElement dynamicElement = new XmlElement("dynamic");
        XmlElement outerisNotEmptyElement = new XmlElement("isNotNull");
        outerisNotEmptyElement.addAttribute(new Attribute("property", "oracleStart"));
        XmlElement innerisNotEmptyElement = new XmlElement("isNotNull");
        innerisNotEmptyElement.addAttribute(new Attribute("property", "oracleEnd"));
        innerisNotEmptyElement.addElement(new TextElement("<![CDATA[ select * from ( select row_.*, rownum rownum_ from ( ]]>"));
        outerisNotEmptyElement.addElement(innerisNotEmptyElement);
        dynamicElement.addElement(outerisNotEmptyElement);
        answer.addElement(dynamicElement);
       // 在第二个地方增加
        parentElement.addElement(answer);
    }
}
